CVE-2026-44582

lowpriority · track · 0EPSS 0.002 · 12 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.21% (12th) EPSS

CVSS 3.7 · low

Is it mine?

13 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Next.js is a React framework for building full-stack web applications. From 13.4.6 to before 15.5.16 and 16.2.5, React Server Component responses can be vulnerable to cache poisoning in deployments that rely on shared caches with insufficient response partitioning. In affected conditions, collisions in the _rsc cache-busting value can allow an attacker to poison cache entries so users receive the wrong response variant for a given URL. This vulnerability is fixed in 15.5.16 and 16.2.5.

cvss

Technical severity, 0–10. One row per scoring source.

3.7

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.13.7lowAV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · security-advisories@github.comexploitability 2.2 · impact 1.4

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · OSV

v3.13.4lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-328USCWE-328USCWE-328US

affected products (13)

Products and version ranges known to be affected.

Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Vercel Next.js <15.5.16all versionscert_bundDE
Vercel Next.js <16.2.5all versionscert_bundDE
vercel next.js< 15.5.16cert_bundDE
vercel next.js< 16.2.5cert_bundDE
vercel next.js13.4.6, → 15.5.16enisa_euvdEU
vercel next.js16.0.0, → 16.2.5enisa_euvdEU
vercel next.js13.4.6 → 15.5.16fstec_bduRU
vercel next.js16.0.0 → 16.2.5fstec_bduRU
vercel next.js13.4.6 → 15.5.16nvdUScpe:2.3:a:vercel:next.js:*:*:*:*:*:*:*:*
vercel next.js16.0.0 → 16.2.5nvdUScpe:2.3:a:vercel:next.js:*:*:*:*:*:*:*:*
npm next13.4.6 → 15.5.16osvUSpkg:npm/next
npm next16.0.0 → 16.2.5osvUSpkg:npm/next

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1401Vercel Next.js: Mehrere SchwachstellenDeutsch2026-05-06csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Vercel Next.js ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Cross-Site-Scripting-Angriffe durchzuführen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.
GHSA-vfv6-92ff-j949Next.js vulnerable to cache poisoning via collisions in React Server Component cache-busting2026-05-11ghsa · osvUS
### Impact React Server Component responses can be vulnerable to cache poisoning in deployments that rely on shared caches with insufficient response partitioning. In affected conditions, collisions in the `_rsc` cache-busting value can allow an attacker to poison cache entries so users receive the wrong response variant for a given URL. ### Fix We strengthened the `_rsc` cache-busting mechanism to make practical collisions significantly harder and to better separate response variants that should not share cache entries. ### Workarounds If you cannot upgrade immediately, ensure intermediary caches correctly honor `Vary` for RSC-related request headers, or disable shared caching for affected RSC responses until you can deploy a patched release.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd osv NVD CVE.org MITRE

published 2026-05-13modified 2026-10-26

references (4)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan